Various docs improvements (#10)

* feat: inline code to spec, collapsible code segments, fix llms txt, fix nav

* fix: remove changelog filtering

* fix: update icon, add in shimmering logo

* fix: fix docs nits

* fix: docs stuff (#9)

* fix: docs stuff

* fix: linking + biome errors

* docs: mobile mode

* fix: add back in flag handlers for code blocks

* fix: add more steel-cli docs

* fix: add better self hosting docs

* fix: add more cli docs

* fix: update concurrency limits

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Co-authored-by: nas <nasr.mohamed244@gmail.com>